1N4706UR-1

Overview

The Microchip Technology 1N4706UR-1 is a surface mount Zener diode housed in the DO-213AA (MELF) glass package. It provides a nominal Zener voltage of 19 V with a standard tolerance of 5%. The device is rated for a power dissipation of 500 mW and operates within a temperature range from -65 °C to +175 °C. Key electrical characteristics include a maximum reverse leakage current of 50 nA and a low test current of 50 µA.

Feature Summary

• Features an internal metallurgical bond between the metal slugs and silicon die for enhanced structural reliability.
• Utilizes a hermetically sealed glass MELF (DO-213AA) package construction.
• Designed as a surface mount equivalent to the JEDEC registered 1N4678 through 1N4717 series.

Applications

• Voltage regulation in surface mount circuit designs
• High-reliability electronic systems requiring robust component bonding
• Temperature compensated reference applications

Procurement Notes

Verify the specific suffix requirements, as the -1 designation indicates an internal metallurgical bond option similar to military specifications. Confirm that the DO-213AA package form factor aligns with your PCB footprint constraints. Ensure that the 500 mW power rating and 19 V breakdown voltage meet the thermal and electrical demands of your target application environment before finalizing procurement.

Selection Notes

Select this component when a surface mount solution is required for the 19 V Zener voltage level. The 1N4706UR-1 serves as the direct SMD counterpart to the axial-leaded 1N4706. Consider this part if high reliability and hermetic sealing are necessary, distinguishing it from standard commercial glass diodes. The low test current of 50 µA makes it suitable for precision biasing applications where minimal power consumption is critical.

Part Context

This device belongs to the 1N4678UR-1 through 1N4717UR-1 series of 0.5 watt glass surface mount Zener diodes manufactured by Microchip Technology. The series covers a voltage selection from 1.8 to 43 volts. These components are engineered to provide a reliable surface mount alternative to traditional axial-leaded regulators while maintaining high-performance characteristics such as tight tolerances and low leakage currents.

Replacement Considerations

The axial-leaded 1N4706 is the functional equivalent but requires a different mounting method. For surface mount replacements, verify compatibility with other DO-213AA packaged Zener diodes offering 19 V and 500 mW ratings, ensuring the metallurgical bond feature is not strictly mandated by the design specification.

FAQ

What does the "-1" suffix indicate in the part number?

The "-1" suffix identifies that the device features an internal metallurgical bond, where metal slugs sandwiching the die are bonded to the silicon for high reliability.

What is the Zener test current for this component?

The Zener test current is specified at 50 µA, which is lower than standard commercial Zener diodes.